Mercedes CLK 320 CDI (3.0) 224 hp — Stage 1 file (+31 hp)

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Chip tuning for Mercedes CLK 320 CDI (3.0) 224 hp ECU

Mercedes CLK (2003 - W209) 320 CDI (3.0) 224 hp — premium diesel engine of the passenger segment of the Mercedes-Benz Group AG (Mercedes-Benz, AMG, Maybach, Smart, EQ) group (Германия, 1926). Stage 1 chip tuning raises power from 224 to 255 hp (+31 hp, +14%) and torque from 510 to 600 Nm (+90 Nm). This engine ships with different ECU variants: Bosch EDC16C2, Bosch EDC16CP31, Bosch EDC17CP01, Siemens/Continental VGSx-NAG2. The flashing method is determined by the specific unit: OBD, Bench or Boot mode. In the CHIPOK database: 4 configurations · 4 ECU variants. The 2003 generation — first-generation CDI/TDI/HDi diesels with relatively simple ECU protection; OBD reading works directly.

Mercedes is one of the most protected brands in the chip tuning industry in terms of encryption. Maybach is Mercedes's ultra-luxury sub-brand. Mercedes-Benz is the world's oldest carmaker, founded in 1926 by the merger of Daimler-Motoren-Gesellschaft and Benz & Cie. Mercedes diesels are known for smooth, quiet running, a hallmark of the premium segment. Mercedes diesels have long been known for legendary reliability, with German taxi fleets running to million-kilometre mileages. Mercedes pioneered CDI (Common-rail Direct Injection) technology on passenger-car diesels, in series production since 1997.

The AMG community is active in Germany, but the protection is the toughest in the industry, so Stage 1 on AMG usually requires Bench. Stage 1 on Mercedes often requires refreshing the adaptations after the flash. Mercedes is one of the most protected brands in the chip tuning industry in terms of encryption. On modern high-output Mercedes, Bench reading is often required because of the encryption. The Mercedes premium segment is a high-output platform with Stage 2 potential. High-output Mercedes engines are premium-class with solid headroom for Stage 1.

Frequently asked questions

What power gain do you get after chip tuning the Mercedes CLK 320 CDI (3.0) 224 hp?

After Stage 1 the power of the Mercedes CLK 320 CDI (3.0) 224 hp rises from 224 to 255 hp, a gain of 31 hp (+14%). Torque rises from 510 to 600 Nm (+90 Nm).

How does Stage 1 differ from stock on the Mercedes CLK?

Stage 1 chip tuning of the Mercedes CLK is a rework of the ECU maps: boost pressure, ignition advance, target lambda and the removal of factory torque limiters. The gain is +31 hp with no hardware changes.

Is Stage 1 safe on the high-output Mercedes CLK 320 CDI (3.0) 224 hp?

The high-output Mercedes CLK 320 CDI (3.0) 224 hp has a conservative factory calibration aimed at the mass market. Stage 1 unlocks the engine's real potential while turbo and injector life are preserved.

How much does Stage 2 add on the Mercedes CLK?

Stage 2 on the Mercedes CLK 320 CDI (3.0) 224 hp means software + hardware (exhaust, intake, intercooler). The gain depends on the specific hardware combination.

Which ECUs are found on the Mercedes CLK 320 CDI (3.0) 224 hp?

The Mercedes CLK 320 CDI (3.0) 224 hp was fitted with different ECUs depending on the year and trim: Bosch EDC16C2, Bosch EDC16CP31, Bosch EDC17CP01, Siemens/Continental VGSx-NAG2. The write method (OBD, Bench, Boot) is determined when the unit is read.

What happens to the Mercedes CLK warranty after chip tuning?

The factory warranty of the Mercedes CLK does not remain valid after Stage 1 — the manufacturer withdraws its obligations once the ECU software is changed. CHIPOK provides its own warranty on its work and support.

How long does remapping the Mercedes CLK take?

On the Mercedes CLK 320 CDI (3.0) 224 hp: OBD flash 25-30 minutes, Bench (if required) about an hour. The file processing itself takes 5-30 minutes once the original bin is received.

Is the original file kept when chip tuning the Mercedes CLK?

Yes, the original ECU firmware of the Mercedes CLK 320 CDI (3.0) 224 hp is kept and can be flashed back at any time. Returning to stock via OBD takes 25-30 minutes.

What is the price of a Stage 1 remap for the Mercedes CLK?

Stage 1 for the Mercedes CLK 320 CDI (3.0) 224 hp is paid for with CHIPOK credits (1 cr = 1 €). The final amount is set in the calculator, taking the extra options (off functions) into account.

Last updated: 31.08.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno